of ventilation, because prolonged breathing of fumes from these substances may be harmful as
well as obnoxious. Overheated selenium rectifiers may give off toxic fumes. Stoves, heaters,
furnaces, or forges that burn any kind of fuel--gasoline, oil, wood, coal, charcoal, or any other
combustible material--should be vented to prevent asphyxiation. Fumes generated by the
charging of storage batteries also require venting, because they can be both annoying and
f. Keeping the Working Site Orderly. Although your workbench area or site of work will
necessarily get messed up somewhat while working on the various jobs, you must continually try to keep
your workplace neat, clean, and orderly. A place that is kept that way will be generally healthful, safe,
and productive. Good "housekeeping' not only benefits you and your fellow repairmen by creating a
good atmosphere, but is also tends to convey to the shop's visitors the notion that you and your shopmates
take pride in doing work of high quality. In some shops the standard practice is to set aside a certain
amount of time, usually the last 15 to 30 minutes of the working day, to clean up all work areas, put away
tools and other items, and make sure the building or area is secure as necessary. Such a period also gives
time to perform preventive maintenance on shop machines, tools, test instruments, and other property that
belongs to the shop and its members.
Section II. TOOLS
4. TOOLS AND THEIR USE
A mark of proficiency as repairman or technician is your knowledge of the tools associated with your
specialty. You must know the names of your tools and when, why, where, and how to use each one.
Most of the tools you'll need as a repairman will come in a tool kit the shop or unit supply will issue to
you. Other tools, test instruments, and similar items will usually be loaned to you by the toolroom or
supply room as you need them.
a. Tool Kits. The specific tool kit you get will depend upon what your shop or unit has on hand or
can get. Most likely you will receive a TK-105/G, or a TK-100/G, or a TK-101/G. Any one of those tool
kits contains most of the tools needed by the repairman of radio, radar, and similar electronic equipment.
b. Purpose and Application of Tools. Most of the tools in a given tool kit are used to fasten and
unfasten something. For instance, all screwdrivers and wrenches are devices that tighten or untighten
something by a twisting moving of the tool by hand; soldering irons and soldering guns to solder or
unsolder connections and parts. Cutters unfasten wire and sheet metal by their shearing actions. The
pliers, the screwdrivers, and the soldering implements tend to be the most often needed and therefore the
most frequently used tools in any kit. But many other tools are also necessary from time to time.